Carbureter



w. A. EDWARDS.

CARBURETER.

APPLICATION FILED MAY I4, 1914.

' Patented Mar. 1920, I

ards

* ;i by 6% W. A. EDWARDS.

CARBURETER.

AIPLICATZON FILED MAY I4, 1914.

1,335,430. Patented Mar. 30,1920;

4 SHEETSSHEET Z.

gab N LE 'I m W. A. EDWARDS.

CARBU RETER.

APPLICATION FILED MAY 14, 1914.

1,335,430. Patented Mar. 30, 1920.

4 SHEETS-SHEET 3.

w. A. EDWARDS.

CARBURETER.

APPLICATION FILED MAY 14, I914.

Patented Mar. 30, 1920.

4 SHEETS SHEET 4.

, UNITED STATES PATEN'I ivics;

WILLIAM A. EDWARDS, or CHICAGO, ILLINOIS, assrelvon To rInnEIs v &.xnorr Ere. oo, or CHICAGO, ILLINO S, A CORPORATION or ILLINOIS.

CABBUIVRETER.

To all whom it may concern:

Be it known that I, WILLIA A. EDWARD?it 'a subject of the King of GreatBritain, an a resident of the cit of Chicago, 111 the county'of Cook andtate of Illinols, have invented certain new and useful Improvements inCarbureter's; and I do hereby dean adjustment of the throttle by anoperator is very seldom dependent upon the particular construction ofthe engine itself, but is rather a feature. depending uponthe/capability of the carbureter for introducing fuel to the engine in,the proper proportion and amount, simultaneously with a movement of thethrottle valve. In a great many cases a motor has failed to pick up oraccelerate within a sufliciently short space of time when a throttle isthrown to wide open position, and this is largely due to the lag of thecarbureter mechanism, which permits a too lean mixture to flow to theengine before the various elements have adjusted themselves to thechange in conditions.

This invention relates to an auxiliary fuel supply means for acarbureter whereby the sudden draftj through the carbureter occasionedby the wide opening of the throttle valve, serves to actuate mechanismsfor introducing a charge of fuel to the mixing chamber of the carbureterunder pressure and spraying the same in the path ofthe incoming air.

It is an object of this invention to construct an improved carbureter .enipped with a plurality of fuel jets where y fuel may be introduced intothe mixing chamber of the carbureter by aspiration,as well as forciblysprayed therein under pressure.

It is also an object of this invention to construct an improvedcarbureter wherein a sudden movement of the inlet air valve thereofserves to force a charge of fuel into the'mixing chamber of thecarbureter under pressure. 7

It is also an object of this invention to construct an improvedcarbureter having an Specification of Letters I Patent. Patented lIal30, 1920 Application fileu May 14, 1914. Serial No. 838,425.

auxiliary fuel chamber thereon with a pie-- ton movable therein andconnections between said piston and the valve on the carbureter to forcethe fuel from said chamber under pressure into the mixing chamber of thecarbureter.

It is also an object of this invention to construct a carbureter havingan auxiliary fuel nozzle thereinadapted to have injected vtherethrough acharge of fuel under pressure with an initial sudden opening of thethrottle valve and continually supplying fuel 65. p

when the throttle valve is left in wide open position. 4

It is also an object of this invention to construct a carbureter havinga usual inlet needle valve affording communication to construct acarbureter having a plurality 8 0 of auxiliary fuel inlet nozzles eachadapted to introduce a charge of fuel into the mixing chamber with asudden opening of the air inlet valve.

It is also an object of'this invention to j' construct a carbureterhaving an auxiliary fuel chamber adapted to receive fuel from. the floatfeed chamber of the carbureter and provided with a piston actuatable bythe inlet air valve of the carbuerter to inject one 'or more jets offuel under pressure into the mixing chamber with a sudden opening of 4the air valve. t

It is furthermore an object of this invention to construct a carbureterequipped with a plurality of fuel inlet means to the mixing chamberthereof and with mechanism for introducing a charge of fuel underpressure through certain of said fuel inlet means. It is finally onobject of this invention to construct a carbureter simple in adjustmentand capable ofv rapid variations in the throttle adjustment thereof toinsure an-immediate responsive action of the motor to which it isconnected.

The invention (in a preferred form) is specification.

In the drawings Figure 1. is afront elevation of a carbureter embodyingthe principles of my invention.

Fig. 2 is a rear elevation. thereof.

Fig. 3 is a central vertical section taken longitudinally 0f,thecarbureter.

Fig. 4 is a horizontal'section taken on line 4-4 of Fig. 3.

Fig. 5 is a fragmentary top plan view showing the air inlet valve.

Fig. 6 is a section taken on line 66 of F ig. 3 with parts omitted.

s shown in the drawings:

The carbureter casing embraces a float feed chamber 1, a mixing chamber2, an air inlet chamber 3, and a dash gaot or pressure cylinder fuelchamber 4:. lommunication is afforded between the float chamber 1, and

the mixing chamber 2, through an offset chamber 5, on one side of thefioatfeed chamber, which communicates with an air passage 6, 1ncommunication with the mlxmg chamber, and on one side thereof. The inletof fuel to the carbureter from the gasolene supply is through a pipe7,'which is threaded into a plug 8, which is in turn threaded into aplug 9, which is itself threaded into the casing at the lower end ofsaid chamber 5. Said plug 9,is centrally apertured to afford a valveseat for a needle valve 10, which, as shown, is provided with i atubular stem'll, with a peripheral flange 12, thereon. Said plug 9, hasa peripheral passage 13, therearound which communicates with the chamber5, throughthe upper end of said plug '9, by means of a passage 14. Ofcourse, suitable gaskets are provided between the various threadedmembers to prevent leakage therethrongh.

A spill cup 15, is partially supported in position by said plug 9, dueto the clamping of aring member 16, integral with an extension arm 17,forming a part of said spill cup, said ring, 16,being clamped to thelower portionof the casing "beneath the chamber 5, by said plug. Saidextension 17, is provided with a passage 18, therethrough,

which communicates with the peripheral passage 13, in the plug 9, sothat fuel in the chambers 1, and 5, may flow downwardly through thepassage 14, thence through the passage 13, and into the pars sage 18, inthe spill cup member.

\ For the purpose of controlling the inlet of fuel to the float feedchamber through said inlet pipe 7, a float 19, is adjustably securedupon a stem 20, the lower end of which is enlarged and rests upon theouter end of a pivoted lever 21, which at its other or inner end,engages be'neatl-i said flange 12, on the needle valve element ll. Thus,as

:the level of fuel within. the float feed chamberfalls, the floatdescends and rests upon said lever-21-, serving to elevate the needlevalve 10, to admitfuel when the ,level has arisen to a predeterminedamount, when the weight of the float is removed from the lever, 21, aspiral spring 22,- coiled around said tubular element 11 of the needlevalve, impels the same downwardly again into closed position. An axiallyapertured guide element 23, is threaded into a partition 24, separatingthe chambers 5,-and 6, thus aiford- .ing a guide for said needle valveelement,

the portion 11, of which surrounds the same, and also providescommunication between 'the respective chambers.

A spring thrust needlevalve 25, is mounted in .said chamber 6, and isnormally impelled downwardly by a spring 25 to close the aperture insaid element 23. Connected .85 air inlet valves and outlet valves areprovided in the mixing chamber and are respectively denoted by thereference numerals 26, and 27, with a connecting rod 28, pivotallyconnected to each of said butterfly valves, serving to insuresimultaneous operation thereof. The valve 27, which is termed thethrottle valve of the carbureter is'keyed upon a shaft 29, which hassecured at atpoint on the outer side ofthe casing an actuating throttlelever 30. lVIechanism is provided for insuring a proportionate openingof the needle valve 25, with the aforesaid valves 26, and 27, butinasmuch as this forms no part of this invention a brief descriptionthereof will suffice.

An adjustable cam element 31, is secured on the outer end of said shaft29, adjacent the lever 30, and bears against the extremity of an arm 32,of a bell crank, which is 'lug 35 which is. keyed upon said shaft 33.

so that actuation of said tubular member 34, will cause rotation of saidshaft 33. In order to rotate said tubular member-34, coincidently withmovement of the throttle valve lever 30, the other arm 36, of said bellcrank is provided with a set screw 37, which bears against a cam 38. onthe extremity of a shaft 39, extending through said tubular element.Accordingly, .when the lever 30, is actuated the cam 31, will depressthe arm 32, of the bell crank, thus causing the other arm 36, thereofthrough the intermediation of the set screw 37, to thrust said camelement 38, to one side with a consequent pivotal movement of thetubular element 34, and a rotation of said shaft 33. Said shaft 33, atits inner end is pro vided with'an arm 40, which engages in a notch inthe needle valve element 25, to. raise and lower the same with even aslight movement of said transverse shaft 33. l 1 0 when'starting theengine.

- cable 43, is pulled by the operator, the shaft The'upper end of saidshaft 39, is provided with an arm 42, to which is connected a rod orcable 43, for manual actuation whereby the needle valve may be openedwithout opening the throttle valve in order to admit an over-abundanceof fuel thereto When the rod or 39, is rotated, in the tubular element34, thus causing a corresponding movement of the cam 38, on the lowerendthereof, which, bearing against the end of the set screw 37,

causes the tubular element to be slightly rotated with a consequentrotation of said. shaft 33, and opening of the needle valve 25.

A reducing plug or coupling 44, is threaded into the lower end of thefloat feed chamber and secured therein is one end of a pipe 45, which atits other end communicates in said dash pot or piston chamber 4.Slidably mounted in said chamber is a piston 46, connected on a pistonrod 47 which extends upwardly into the air inlet chamber 3, and is thererigidly secured to a puppet valve 48. A spiral spring bears at one .ofits ends against said puppet valve 48,

and at its other upon the partition between the respective chambers 3and 4, thus normally impelling said puppet valve into closed positionwith the piston.in 'raised position in the dash pot cylinder 4.

The pipe 45, opens into chamber '4, above .the piston 46, which at alltimes prevents a vacuum from being formed above the piston 17 and alsoas therate of passage of the fluid through passage 45, is limited, a

' Said spill cup 15, s provided with an.

apertured lug 52, in the bottom thereof into whichis threaded a fuelnozzle 53, which projects upwardly into the mixing chamher of thecarbureter, through a slot in the. air butterfly inlet valve 26. Ahollow plug 54, having a peripheral passage 55, comv,municating withsaid hollow interior by suitable apertures,.is threaded into the underface-ofsaid cup 15,, in alinement with the nozzle 53, and by suchthreaded engagement serves to clamp therein a ring element 56, of a pipe57, which is provided with another ring element 58, engaging around aperipheral passage 59, in-a hollow plug 60,

threaded into the bottom wall of said chainber-r4. Also communicating insaid ring.

element 58,"is apipe 61, which leads up- .wardly and through the 'airpassage 3, and

is there directed upwardly into the mixing chamber of the carbureter ata point above said nozzle 58. Thus it is apparent that fuel may flow tothe nozzle 53, from the float feed chamber through the various pa's-.sages leading to thepassage 18, and, also from the chamber 4, to saidnozzle through the various passages leading to the pipe 57 Fuel mayalsobe admitted to the mixing chamber'through the pipe 61, which leadsdirectly from the ring element 58, wherein' it is in communication withthe hollow interior of the plug 60. An air inlet port 62, is provided inthe'side walls of the chamber 6, to admit a flow 'ofair at all timeswhen.

the throttle valve is slightly open, across the inlet of the fuel needlevalve 25. Connected annular passages 63, are cast upon the casingsurrounding the mixing chamber for the purpose'of water jacketing-thesame if-desired, and tubularconnections 64'and 65, respectively, areprovided for the pur-.

pose of attaching the inlet and outlet water pipes thereto. 1 Theoperation is as follows:

A certain quantity of fuel is maintained in the float feed chamber atall times by the automatic action of the float which serves to admitfuel thereto from time to time. of course the needle valve 25, is'raisedfrom its. seat, thus permitting a How .of fuel therethrough to be mixedwith air entering at the port .62, and likewise through the inlet airvalve 26, the mixture then passing to the manifold of the engine.

This carbureter' is particularly adapted to supply a proper'andsufiicient'amount of fuel to the engine with a sudden opening When thethrottle valve 27, is opened i of the throttle valve to enablethe-engine to instantly accelerate or pick up. For this purpose an"auxiliary puppet air inlet valve 48, is provided, the valve stem ofwhichis connected to the piston 46, in the dash pot chamber 4, so thatas the air inlet valve is suddenly opened, due to an excessive draftexerted by the engine as when the throttle valve is thrown wide open,the piston' is.

forced downwardlyflthus pressing on the to spurt upwardly under pressurethrough said pipe 61, which of course injects the fuel into the mixingchamberof the car-' fuel in the] chamber and causing the same a bureter.The fuel underpressure is also forced through the pipe 57,- andthenceupwardly through the nozzle 53, so that a plurality of jets ofhydrocarbon are intro-- 'duced into the mixing chamber under pressure.The amount of fuel so forced through the nozzle '53 is considerably lessthan that forced through the pipe 61, owingto the smaller diameterof-theorifice in the former.

If the throttle valve is left open, of course the initial pressure inthe dash pot chamber is dissipated with a cessation of movement of thepiston, but the intense draft of the engine will serve to continue thefiow of hydro-carbon through the spray nozzle 53, which receives thesupply from the passage 18, connected to the float feed chamber asdescribed, and a certain amount will also be drawn up through the pipe61, which receives its supply from the chamber 4. The piston 4-6, notonly serves to inject a charge of fuel into the mixing chamber with movement thereof but also has a dampening effect upon the auxiliary airinlet valve 48, to prevent fluttering of the same.

I am aware that various'details of construction may be varied through awide range without departing from the principles i of this invention. Itherefore do not purpose limiting the patent granted otherwise thannecessitated by the prior art.

I claim as my invention:

1. Ina device of the class described a carbureter comprising a floatfeed chamber, a mixing chamber, an air inlet chamber, a dash potchamber, a pipe connecting said float feed chamber and said dash potchamber to admit a flow of fuel to the latter, a spray nozzle projectinginto the mixing chamber, unrestricted passages connecting said spraynozzle with ,said float feed chamber, a passage connect-ing said spraynozzle with said dash pot chamber, an air valve for said air' chamber,and a piston adapted to be actuated thereby in said dash pot chamher toforce a charge of fuel through said spray nozzle into the mixing chamberof the carbureter.

2. In a device of the class described a carburetercomprising a floatfeed chamber, a mixing chamber, an air inlet chamber, a dash potchamber, an air inlet valve in said air inlet chamber, a piston in saiddash pot connected to said air inlet valve, communication between saidfloat feed chamber and said dash pot chamber to admit a flow of fuel tothe latter, a spray nozzle projecting into the mixing chamber, andcommunicat ing with said float feed chamber, a passage connecting saidspray nozzle with said dash pot chamber, and a second spray nozzlecommunicating with said passage, between said first spray nozzle andsaid dash pot chamber thus permitting a plurality of jets of fuel to beinjected into the mixing chamber when said piston is actuated in thedash pot chamber.

3. In a device of the class described a float feed chamber, a mixinchamber, a dash pot chamber, a piston in t- 1e dash pot chamber, spraynozzles projecting into the mixing chamber and each thereof havingconnections with said dash pot chamber and with said float chamber,another connection between the float chamber and said dash pot chamber,and'means adapted to actuate said piston to force a charge of fuel underpressure into the mixing chamber of the device through said spraynozzles.

4-. In a device of the class described a carbureter comprising afloatfeed chamber and a mixing chamber, an auxiliary fuel chamber, a pistonmovable therein, spray nozzles projecting into the mixing chamber,

auxiliary chamber independently of said plurality of hydrocarbon nozzlesthrough which jets are introduced at different levels lnto the mixingchamber ofa carbureter by said valve and piston when a sudden draft ofair takes place through the carburetor.

6. In a device of the class described a carbureter, a spring pressedauxiliary air valve thereon, a piston connected to simultaneously movetherewith, a fuel chamber inclosing sald piston, and a plurality ofspray nozzles communicating with said chamber to admit a charge of fueltherethrough into the mixing chamber of the carbureter at differentlevels when said piston is actuated by movement of said air valve.

7. In a device of the class described, a float feed chamber, acarbureting chamber, an air inlet thereto, a spring resisted valve forsaid'inlet, a fuel spray nozzle adapted to direct fuel into saidcarbureting chamber, a dash pot forming a part of said carbureter, apiston in said dash pot connected for movement with said airinlet valveso that downward movements of said valve impart a downward movement tosaid piston in said dash pot, a passage communicating between said floatfeed chamber and the upper portion of said dash pot behind said piston,and

a passage communicating between said fuel spray nozzle and said dash potin front of said piston whereby movement, of said I piston by the airvalve forces a charge of a piston in said dash pot operatively connectedto-said auxiliary a r valve to rece ve movement therefrom, a passagecommunicating between said float feed chamber and said dash pot toconvey fuel into the dash pot on one side of the piston therein, and

a passage communicating between said fuel nozzle and said dashpot, saidpassage'communicating-into said dash pot on the other side of said}piston whereby movements of said piston imparted thereto by movements ofthe air valve force a charge of fuel under pressure through said nozzlein excess of ythat which is withdrawn due'to the aspira- 7 passagecommunicating with said dash pct and said fuel supply nozzle, theopenings of said respective passages into said dashpot being so situatedwith reference to said p ston'that an opening movement of said air valveoperates the piston'to withdrawfuel from the float feed chamber anddischarge fuel under pressure from the .dash'pot into said nozzleindependent of and in excess of the aspiration eflect of the air passingsa d nozzle. J 'i 10.. In a carbureterof the class described, a floatfeed chamber, a carbureting chamber, an" inlet chamber for air, a dashpot chamber, apassage communicating with said float feed chamber andsaid ,dash' pot chainber to admitfuel from'thefloat f eed chamber tothedash pot chamber, a spray nozzleprojecting' into. the carburetmgchamber, means affording communication between sa d spray nozzle, saidfloat feed chamber and said dash pot chamber, an air valve for "said airinlet chamber, a piston mounted in said' dash pot adapted when actuatedto forcea charge of fuel through said spray nozzle into the carb1etingchamben and'a Stern on which said air *valve and piston are mountedwhereby saidpiston is moved in the dash pot duetothe same is moved. 111'In a carbureter of the class described, a float feed chamber, acarbureting-chamher, an. air passage leading to said carburetchamber, afuel spray'no'zzle'situated to discharge into the carbureting chamberand subjected to the aspiration eifects of the air flowing through saidair passage into said asuc'tion effect on said air'valve wherebyIcarburetin'g chamber, an auxiliary air inlet,

a suction operated valve in said air inlet,

a sh, p f r a Part f Said a ur tea a piston in said dash pot'operatively connected to said suction operated air valve/so asto beactuatedby said valve, a passage afi'ording communication between said*float feed chamber and said dash pet, apass'age affording communicationbetweenfsai'd float feed chamber, said dash pot and said fuelspray'nozzle, a throttle valve to eont'roltlie f 1 1 mixt r fiQ i t vb eiii mi her, and a valvecontrolling the flow of air hr u h s ai pa adi1'g"t th 'arb'ureting chamber. i r

1 12111 a ea rb'ureter of the class described,

a fl fe d mb r, a armen; cham. her, an air passage leading to s'aidcarburet-' ing chamber; a' .ifuel spray nozzle situated to dischargefuel nto the -ca1-b1irtingeham her and subjected to theaspirationefi'ectof air flowing" through-"said air passage to' saidcarbureting chamber, anauxiliary' air inlet, a suction o erated valve insaid air inlet, a spring resisting movement thereof, a dash pot formingapart of said carbureter,

--.a' piston in said-dash pot, a stem connected to said pistonand tosaid aininlet valve to insure coincident operation of said piston saidair valve, a p'assageafl'ording coinmunication between said float feedchamber and said dash pot on one side of said piston, and a passage,affording communication be tween said fue'lspray nozzle and said dashpot on the other side of said piston to permit a charge of fuel to beforced'through said nozzle into "the carb'ureting chamber in de p n t fand. in" xc s. f th' a pi ion effect of the air upon said fuel nozzlewhen the er rated alves cpsr d 6 thx t 'alcl pis on'd w rdly 1 a d dashA M --g Y I" i 3- n a bilreter 9f, the clas d ibed, a float feedchamber,a 'carburet'ing chamber,

a h vatio mm a 'parfla'f said a b tr' (h ing. a p t' t jthfia nsen irssfiri t 'd 11 1 nozzle project ng into said "carliuretin ha ber; apifi er upplying airin say carburetin'gch'amber to utilize an'aspirationeffect on said fuel nozzl,an auxiliary air P t; a ar a an lia y irarmanectio'ns between' said valve and "said piston whereby piston isoperated when said valve is actuatedb'y suction through thec ar 1 hamaomdash-paadctmmu cations between said fuel nozzle and said hro gh a n zl nt idmrbu t n chamber with actuatio'n'oj the-auxiliary air 514 n f bret 'r of the ass d b d, a carbureting chamber, a fuel supply nozzle todirect fuel thereinto, an air inlet assage to admit air into saidcarbureti g amber past said fuel nozzle, a butterfly "valve con i daish"pot whereby saidfuelmay be forced an auxiliary air inlet passage toadmit air into the carbureting chamber, adash pot assoclated withsaidca'rbureter, piston there- 111, means adf 'nittmg fuel to "said dashpot chamber, ',a communication between saidv dash pot chamber and saldfuel supply" nozzle whereby movement of the piston forces fuel underpressure into said carbureting chamber, and an air valve mounted in.said auxiliary air inlet passage and opera-' tively connected to thepiston in the dash pot to operate the same when said auxiliary air valveis operated by suction in the carbureter.

15. In a carbureter the combination of a mixing chamber, a main fuelnozzle, float feed means for supplying fuel to the main fuel nozzle, apump operated-by sudden m crease in suction in the carbureter to provide an extra supply vof fuel, the said pump being provided with aplurality of ducts havingoutlets in the mixing. chamber at differentelevations so as to operate difi'erentially insupp'lying fuel to themixing cliamber v a mixing chamber, a main fuel nozzle, a float feedchamber for supplying fuel to the main f-uel nozzle, a pump operated bysudden increase of suction in the-carbureter to provide anextrasupplyof'fuel, a passagev'vay connectingthe pump and float feedchamber-,- anauxiliary nozzle communicating with sa d passagewayyand zmauxiliary nozzle communicating directly with the pump.

17.' In a carbui'eter, the combination of a mixing chamber, a main fuelnozzle, a float feed chamber for supplying fuel to the main fuel nozzle,an air inlet valve, a pump operated by the air inlet valve to provide anextra supply of fuel to the mixing chamber when the valve is suddenlyopened, a fuel passageway connecting" the pump and the 1 6, In a.carbureter, the, combination of float feedj'chambery and a fuel nozzlein the mixing chamber communicating with said passagei'vayintermediateof the 'pump and p the float feed chamber.

18. In a cai'bureter, the combination ofa mixing chamber having a mainfuel nozzle,

an air inlet adjacent the main fuel nozzle', "a

plurality of auxiliary air passageways, a pump for increasing the normalsupplyof fuel, and an auxiliary fuel nozzle supplied with fuel by saidpump and locatd at the intersection of the said auxiliary air pas-isageways. u 19. In acarbureter, the combination of a mixing chamberhaving a main fuel nozzle,-

a main fuel reservoir, float feed means for furnishing a normal supplyof fuel to the main fuel nozzle, a pump piston for, aug'-' chamberinclosing the pump piston, said chamber being provided with a passagewaytherefrom at each side of the piston corn-' numicating with the mainfuel reservoir.

'20. In a carbureter, the combination of a mixing chamber, a main fuelnozzle in the mixing chamber, a main fuel reservo1r,'fioat feed meansfor providing a normal supply of fuel to the main fuel nozzle, a pump ps ton, a cliamber'inclosing the said pump piston. and having apassageway therefrom at each side of the piston communicating withWILLIAM A. EDWARDS.

\Vitnesses v FREDERICK PURDY, LAWRENCE REIBSTEIN.

inenting the normal supply of fuel, and a

